Karadoc's Apoc Mod - Probably the best mod for xcom apoc. It was designed to play turn based mode but it is also winnable in real time.
My goals in making this mod were to make Apocalypse more balanced (particularly to reduce the power of toxin guns and disruptor shields), and also the make the game more challenging. I've tried to balance the game so that I will only win if I play at my best (without reloads, etc).
Laser Sniper Gun is still useless but now it has 98 accuracy instead of 95.
Last verson 0.9 - 5 march 2009 download link: http://www.strategycore.co.uk/files/index.php?dlid=720